I am Lao Wen, an embedded engineer who loves learning. Follow me to become even better together! Compiled by | strongerHuang WeChat Official Account | strongerHuang UART, SPI, I2C and other serial communications are very common methods in embedded development. The underlying communication principles are not difficult, but many beginners struggle to learn them. Today, … Read more
These animated diagrams of signal waveforms in electronic systems help us understand the mechanism of transmission. 1 SPI Transmission ▲ Figure 1 SPI Data Transmission ▲ Figure 1.2 SPI Data Transmission (2) ▲ Figure 1.3 SPI Timing Signal 2 I²C Transmission ▲ Figure 1.2.1 I2C Bus and Addressing Method 3 UART Transmission ▲ Figure 1.3.1 … Read more
Image Source: www.parlezvoustech.com 1. Common Hardware Communication Protocols? Serial Communication Protocols UART (Universal Asynchronous Receiver Transmitter)： An asynchronous serial communication protocol that does not require a clock signal, commonly used for simple point-to-point communication. SPI (Serial Peripheral Interface)： A synchronous serial communication protocol, typically used for high-speed communication between microcontrollers and external devices such as … Read more
Implementation of Communication Protocols in Industrial Automation Using C Introduction With the development of industrial automation, the demand for communication between various devices, sensors, and control units is increasing. In this context, communication protocols have become an essential foundation for data exchange among different systems. The C language, with its efficiency and low-level characteristics, is … Read more
What is the JTAG Interface? Visually, the JTAG interface is the blue 20-pin connector shown in the image above. What is the Purpose of the JTAG Interface? To download programs to the microcontroller. To debug the microcontroller online, such as step debugging, power-off debugging, viewing register values, etc. Does the JTAG interface for STM32 need … Read more
For embedded developers and hardware hackers, JTAG is the standard for debugging and accessing microprocessor registers. This protocol has been in use for many years and is still used today. The JTAG debugging interface requires VCC, GND power signals, and four debugging signals: TMS, TCK, TDI, and TDO. Additionally, TRST and RESET reset signals and … Read more
Developing and debugging embedded systems is a complex task that requires powerful tools and interfaces to ensure the correctness of hardware and software. In this field, JTAG (Joint Test Action Group) and SWD (Serial Wire Debug) are two commonly used debugging interface standards that play a crucial role in embedded system development. This article will … Read more
01 Introduction to JTAG JTAG (Joint Test Action Group) is an interface established by a group called the JTAG group, founded in 1985. In 1990, IEEE deemed everything appropriate and released IEEE Standard 1149.1-1990, named the Standard Test Access Port and Boundary-Scan Architecture, which is the renowned JTAG. Do you know the three main functions … Read more
For more information on RS-485, you can also refer to some previous articles in our series: 1. Please check out this comprehensive RS-485 beginner’s guide!2. From beginner to advanced applications! Say goodbye to using RS-485 without understanding it! 3. What projects to test with RS-485, and how to test them? ▉ Overview of RS-485 RS-485, … Read more
Follow+Star Public Number, don’t miss wonderful content Source | Zhou Ligong The RS-485 bus is widely used in communication, industrial automation, and other fields. In practical applications, it is often encountered whether to add pull-up and pull-down resistors and what size of resistors is appropriate. Below we will analyze these issues in detail. Why are … Read more